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investigative correspondent for nbc news. with me here in the studio is nbc news terrorism expert michael leiter. former director of the national counterterrorism center. thank you both for joining me. michael isikoff, let me go to you first. "the boston globe" is reporting that officials have recovered a second -- from the scene of the exploexs. what is your take on that? >> well, the fbi would not confirm that at the briefing we just had. they did confirm there are two devices, both in black nylon bags. search -- pressure cooker bombs. one point that i thought was quite interesting that fbi special agent in charge deloria made, these are heavy bombs. two heavy bombs in black nylon bags at two locations about 75 to 100 yards away from each other that were set off within 12 seconds. it remains an open question whether that could have been done by one perpetrator or more than one to have placed those two bags within a short period of time in this open, crowded area and not be noticed. it does raise questions whether one person could have pulled that off. i should tell you that a couple of other p
. and for the very latest on the investigation, we're joined now by nbc news justice correspondent pete williams from washington. so, pete, the very latest on the pressure cooker scenario that you're hearing? >> right. as you say, used for decades in terms of building bombs, so that's not going to be an area of inquiry that will immediately lead them in a certain direction, because the instructions, unfortunately, for making these devices are all over internet. just last month, the al qaeda online magazine "inspire" repeated an article that showed how to build pressure cooker bombs. so they've been out there for a long time. the part, the components of this device appear not to be very fancy. in addition to that, there were shrapnel, ball bearings, bbs, from the sound of the doctors you heard at the beginning of your program, apparently nails as well. and then for the explosive basically gun powder, smokeless powder that's commonly available in sporting goods stores. so all these pieces are easily available. some kind of timer as well. then placed in black sacks and put in two different spots. so wha
Search Results 0 to 3 of about 4 (some duplicates have been removed)

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